Add OpenTelemetry forwarder infrastructure#9136
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- Add OpenTelemetry.OutOfProcess.Forwarder.Configuration 0.1.0-beta.1 package version - Add ENABLE_OTEL conditional compilation: when set, adds package reference and defines BUILDING_OTEL preprocessor symbol - Set ENABLE_OTEL in generate-dev-sln.ps1 for dev builds - Fix missing newline at end of generate-dev-sln.ps1
wiktork
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Mar 30, 2026
wiktork
reviewed
Mar 30, 2026
Address review feedback: remove ENABLE_OTEL gating so the package is always referenced and BUILDING_OTEL is always defined, avoiding the need for two separate builds.
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wiktork
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Apr 20, 2026
wiktork
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Apr 20, 2026
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Summary
Adds the infrastructure for OpenTelemetry out-of-process forwarder integration. This is PR 1 of 6 see #9135 for the full feature overview.
Changes
OpenTelemetry.OutOfProcess.Forwarder.Configuration0.1.0-beta.1 package versionBUILDING_OTELpreprocessor define, both gated onENABLE_OTELMSBuild propertyENABLE_OTEL=truefor dev builds; fix missing newline at EOFHow it works
When
ENABLE_OTELis set (to any non-empty value), the build:OpenTelemetry.OutOfProcess.Forwarder.ConfigurationBUILDING_OTELconstant for conditional compilationAll subsequent OTel code will be guarded with
#if BUILDING_OTEL, ensuring zero impact on the default build.Testing
ENABLE_OTEL: no change in behavior, package not referencedENABLE_OTEL=true: package restored,BUILDING_OTELdefined